Simulating and evaluating the pressurizer dynamic behavior in various sizes

Baghban, Ghonche; Shayesteh, Mohsen; Bahonar, M.; Sayareh, Reza

doi:10.1016/j.pnucene.2016.09.014

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…Considering the influence of the spray flow, surge flow, safety valve and heater, the model of pressurizer pressure control system is established by MATLAB/Simulink. In [26] a double-district equilibrium model of a nuclear power plant pressurizer dynamic characteristic was established through the approach of theoretical simplified model. Furthermore the proposed model was examined in spray water disturbances and heating disturbances experiments by on-site simulator operating data.…”

Section: Fig 10 Two-regions-three-volume Pressurizermentioning

confidence: 99%

A Review of Advances in Pressurizer Response Research for Pressurized Water Reactor Systems

Farman

ALasadi²,

Redha

2018

International Journal of Simulation: Systems, Science &Amp; Technology

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Section: Fig 10 Two-regions-three-volume Pressurizermentioning

confidence: 99%

A Review of Advances in Pressurizer Response Research for Pressurized Water Reactor Systems

Farman

ALasadi²,

Redha

2018

International Journal of Simulation: Systems, Science &Amp; Technology

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“…The PZR is one of the most important units in PWR, which is needed to ensure the reactor's stable operation. The function of this unit is to maintain the pressure of the reactor coolant system (RCS) in steady-state operation; limit the pressure change within allowable range during transient operation, and avoid the overpressure of RCS in accident situations (Baghban et al, 2016;Chung et al, 2019). The PZR is often used to compensate for positive or negative fluctuation caused by load change transient within the PWR (P. Wang et al,).…”

Section: Introductionmentioning

confidence: 99%

“…The PZR space in the four-region model is divided into regions of continuous vapor, discrete water, discrete vapor, and continuous water (Baghban et al, 2016;Bezrukov et al, 2016;Moghanaki & Rahgoshay, 2014;Zhong et al, 2019). This model considers the effects of vapor bubbles and water droplets' residence in the continuous water and vapor regions.…”

Section: Introductionmentioning

confidence: 99%

A developed analytical model for the pressurizer unit in nuclear power plants

Sheta

Ali

Fikry

et al. 2021

Journal of Radiation Research and Applied Sciences

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The pressure control in the pressurized water reactor (PWR) primary loop is key to secure the safe operation. The pressurizer (PZR) unit is responsible for attaining this task. Thus, the PZR unit's modeling is an important issue for the tracking control purpose and performance analysis concerning the turbine load. This paper develops a mathematical model to accurately predict the PZR unit pressure in the normal and load power changes. The model is a nonequilibrium three region model developed based on the thermodynamics of mass and energy for the water and steam in the PZR. The variations of the pressure and the temperature due to thermodynamic variables (enthalpy, density) and the mechanical work effect are considered in the developed model. The model also addresses other thermodynamic processes such as bulk flashing, spray condensation, interface condensation, wall condensation, and rainout flow. The inlet and outlet flow rates of the primary circuit (PC) and the average temperature and the hot leg temperature are included in the developed model. Based on data generated from the VVER-1200 simulator, parameter estimation, verification, and validation of the developed model through load power changes are achieved. Besides, a comparison with other models given in literature has been performed. This comparison indicated that the developed model is more sensitive against the minimum variation of PZR dynamics. Finally, a closed-loop PZR pressure control system, including a conventional Proportional Integral Derivative (PID) controller, was designed to test the control purpose's developed model. The simulation results over typical load change transients have been demonstrated the feasibility, effectiveness, and accuracy of the developed nonlinear model of PZR for dynamic modeling and control purposes.

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